2 Years After Giffords Shooting, Much Changed?

It's been two years since the shooting in Tucson, Ariz., that killed six people and injured former Rep. Gabrielle Giffords, D-Ariz. To learn what has and hasn't changed since then, host Michel Martin talks with Daniel Hernandez Jr., Giffords' former intern who was credited with saving her life, and Carolyn Lukensmeyer of the National Institute for Civil Discourse.